iotests.py: tiny refactor: move system imports up

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180312152126.286890-7-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>

tests/qemu-iotests/iotests.py

@@ -23,13 +23,14 @@
 import string
 import unittest
 import sys
-sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts'))
-import qtest
 import struct
 import json
 import signal
 import logging
 
+sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts'))
+import qtest
+
 
 # This will not work if arguments contain spaces but is necessary if we
 # want to support the override options that ./check supports.